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Don’t mount the FMU/FRB antenna close to a metal overhead or wall. RF range will be reduced.
Don’t mount the FMU/FRB antenna around the corner of a building or an aboveground
storage tank. RF will be blocked, or range will be greatly reduced. The RF transmission is most
effective when there is line-of-sight between the FMU and fueling vehicle.
Don’t mount AIM2™ modules in a metal or fiberglass box. AIM2™ modules have built-in
antennas and are designed to communicate directly with passive FMUs. RF transmission will be
blocked or greatly reduced if installed in a metal or fiberglass box. If it is absolutely necessary to
mount the AIM2™ module inside a metal or fiberglass enclosure, plan on using an external AIM2™
antenna.
Don’t expect fueling to occur if there is any obstruction (semi, bus, ready-mix truck, etc)
between the FMU and vehicle. There will be no link between the FMU and vehicle. RF will be
blocked, or range will be greatly reduced. The RF transmission is most effective when there is line-
of-sight between the FMU and fueling vehicle.
Don’t expect more than about 50 feet communication range between the FMU and vehicle in
most fuel island scenarios. AIM2™ was designed to transmit between a vehicle at a fueling point,
and the FMU controlling that fueling point. Typically this distance is limited by the size of the fueling
island. Some minor range extensions may be expected when using external AIM2™ and/or FMU
antennas. Installation costs may be minimized by planning for a 50 foot communications range, and
deferring the installation of external antennas.
Don’t expect satisfactory operation from all in-vehicle under-dash installations. Some will
require the AIM2™ module to be mounted in a less obstructed area. Some will require
connection to an external antenna. Some under-dash installations may not allow RF
communication with an FMU. Should this occur, move the AIM2™ module to another location with
less obstruction, or install an external antenna.
Don’t expose the AIM2™ module to road debris, gasoline, ozone, freezing rain, road salt, UV
radiation, and human abuse. The AIM2™ module can survive the same temperatures as the
vehicle, but service life will be greatly shortened by exposure to the environment.
Don’t expect consistent filler neck ring antenna to RF/ID nozzle tag communication if the
range is more than a couple of inches. The nozzle tag and filler neck ring are tuned to
communicate with each other at a distance of two inches or less, and to terminate the transaction
when the nozzle is removed from the filler neck.
Don’t install nozzle tag behind/above splash guard. A splash guard will block nozzle tag RF
connection to filler neck ring.
Don’t expect all vehicles to be OBD II compatible even if they have an OBD II connector.
Some vehicles may have multiple OBD connectors, some of which will not power the AIM2™
module. Some vehicles will have an OBD connector and use an analog speedometer or
chronometer.
Don’t expect all nozzles to be RF/ID Tag compatible. Interfaces have been made to a wide
variety of nozzles, but new nozzle types still appear. If the nozzle is not common and listed in Table
2-2, call your FuelMaster
®
regional sales manager or distributor. Custom applications have been
made for unique fueling nozzles.
Don’t complete all your vehicle and FMU installations before testing the system for
satisfactory operation. If some error has been made in the installation of any of the equipment,
don’t wait until all the installations are complete to find out. Test some newly installed vehicles to
verify satisfactory performance. Whenever a new installation is performed on a new type vehicle or
with a new cable, test the installation before proceeding with similar installations.
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